190140857 has 4 divisors (see below), whose sum is σ = 190170240. Its totient is φ = 190111476.

The previous prime is 190140851. The next prime is 190140859. The reversal of 190140857 is 758041091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190140857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190140851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257 + ... + 19502.

It is an arithmetic number, because the mean of its divisors is an integer number (47542560).

Almost surely, 2^190140857 is an apocalyptic number.

It is an amenable number.

190140857 is a deficient number, since it is larger than the sum of its proper divisors (29383).

190140857 is an equidigital number, since it uses as much as digits as its factorization.

190140857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29382.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 190140857 is about 13789.1572258786. The cubic root of 190140857 is about 575.0317381347.

The spelling of 190140857 in words is "one hundred ninety million, one hundred forty thousand, eight hundred fifty-seven".